EP0045942A1 - Dispositif de détection d'usure d'outils - Google Patents

Dispositif de détection d'usure d'outils Download PDF

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Publication number
EP0045942A1
EP0045942A1 EP81106141A EP81106141A EP0045942A1 EP 0045942 A1 EP0045942 A1 EP 0045942A1 EP 81106141 A EP81106141 A EP 81106141A EP 81106141 A EP81106141 A EP 81106141A EP 0045942 A1 EP0045942 A1 EP 0045942A1
Authority
EP
European Patent Office
Prior art keywords
cutting
sound emission
emission signals
monitored
tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81106141A
Other languages
German (de)
English (en)
Other versions
EP0045942B1 (fr
Inventor
Jeffrey-Michael B.Sc.Dipl.M.A. Drew
Max-Gerhard Dipl.-Ing. Seitz
Hans-Peter Dr. Dipl.-Ing. Kehrer
Gottfried Dipl.-Phys. Eichelbrönner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT81106141T priority Critical patent/ATE16851T1/de
Publication of EP0045942A1 publication Critical patent/EP0045942A1/fr
Application granted granted Critical
Publication of EP0045942B1 publication Critical patent/EP0045942B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
    • B23Q17/0904—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool before or after machining
    • B23Q17/0919—Arrangements for measuring or adjusting cutting-tool geometry in presetting devices
    • B23Q17/0947—Monitoring devices for measuring cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/12—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring vibration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques

Definitions

  • the invention relates to a method for determining tool wear, in particular when cutting tungsten wires, and an arrangement for carrying out the method.
  • Tungsten wires are used, for example, as filaments in the manufacture of incandescent lamps. Since the tungsten wire helices are usually produced in a continuous sequence wound on a core, they must be cut to a certain size according to the intended use; in the case of coils that are wound with an interruption, the separation takes place in the middle of the interruption. The cutting is done with the help of a fixed nozzle knife and a cutting knife, which is moved back and forth perpendicular to the spiral. When the incandescent filament is cut to length, more or less tick formation occurs with increasing wear of the cutting tools on the filament.
  • the invention is therefore based on the object of providing a method and an arrangement in order to be able to automatically detect tool wear so early that the reject can be kept as low as possible and no disruptions in the production process can occur.
  • This object is achieved with the method according to the invention in that the sound emission signals of the cutting process are monitored and evaluated.
  • a sound pickup is coupled to the cutting tool or the nozzle knife, the output signals of which are fed to a signal analyzer for evaluation via a window trigger. It has. shown that the nozzle knife acts as an ideal waveguide, so that the sound sensor can be coupled directly to the nozzle knife.
  • the amplitude of the masked cutting signals is preferably monitored with the aid of a comparator and a warning signal is emitted if a predetermined value is exceeded.
  • FIG. 1 shows an incandescent lamp filament 1 which is wound around a metallic core 2 for manufacturing reasons.
  • the front part 3 of the helix is shown as part of an interruption, a hook 4 being formed at the front end, which is caused by the blunt cutting tools.
  • These checkmarks 4 are very annoying because they can get caught in other coils.
  • FIG an embodiment of an arrangement for detecting the sound emission signals is shown.
  • FIG. 2 again shows an incandescent lamp filament which is to be cut into corresponding pieces with the aid of a nozzle knife 5 and a cutting tool 6.
  • the nozzle knife 5 is disc-shaped and has holes 8 with sharp cutting edges concentric with the axis 7 on the circumference.
  • the bores 8 are adapted to the diameter of the helix 1.
  • the nozzle knife 5 can be adjusted about the axis 7 in order to bring the next bore 8 into effect if the cutting edge at the edge of the bore has become blunt.
  • the cutting tool 6 is also designed as a disk and can be moved back and forth in the direction of the arrow 9, the cutting edge of the cutting tool 6 being set slightly against the nozzle knife 5 in order to obtain a smooth cut. As soon as the cutting edge of the cutting tool 6 has become blunt, a new area of the cutting tool 6 can be brought into effect by rotating the cutting tool 6 about an axis 10 by a certain angle.
  • a sound sensor 11 is coupled to the nozzle meter 5, which picks up the sound emission signals and feeds a signal analyzer 15 via a preamplifier 12, a filter 13 and a main amplifier 14, which records the sound emission signals.
  • the area from the sound emission signals in which only cutting noises occur is masked out with the aid of a window trigger 16.
  • the window trigger 16 receives its signal via a line which is connected to a part 17 of the cutting device in order to indicate that in the selected exemplary embodiment the trigger signal is triggered externally, ie as a function of the movement of the cutting tool 6.
  • the Window trigger 16 can also be triggered by an internal signal. For example, depending on the start of the friction noise, as will be explained in more detail with reference to FIGS. 4 and 5.
  • the signal analyzer 15 is connected via a counter 18 to a comparator 19 which, for example, compares the amplitude and / or duration of the sound emission signals with a still permissible value.
  • Outputs 20 and 21 can be used to emit signals which indicate whether the tools are still good or already bad.
  • FIG. 3 shows, depending on the time, the amplitudes of the sound emission signals which arise during a relative movement between the nozzle knife and the cutting tool without a helix being cut. From a point in time t1, there are friction noises, as indicated by an arrow Rg.
  • FIG. 4 shows a graphic representation of the sound emission signals as a function of time, a helix being cut. As can be seen from Figure 4, 390 / us occur before the occurrence of the friction noise Rg cutting noise. However, these cutting noises are so low that practically no check marks can occur.
  • FIG. 5 shows a graphic representation of the sound emission signals, with cutting noises occurring 590 / us before the time t1, which are of such an amplitude that it can be assumed that the cutting tools have become blunt.
  • the range to to t1 can therefore be used for monitoring the cutting process.
  • This area can be detected, for example, with the aid of a trigger signal TS, which indicates the occurrence of the frictional noise between the nozzle knife and the cutting tool.
  • FIG. 6 shows a graphic representation of the sound emission signals as they occur during the cutting process.
  • the threshold voltage of the window trigger 1 6 is designated.
  • the friction noises between the cutting tool 6 and the nozzle knife 5 and with 25 and 26 cutting noises are designated.
  • the window trigger 1 6 the areas are hidden T1 and the signal analyzer 15 fed in which is to be expected with the occurrence of pure cutting noise.
  • the friction noises 23 of the input and the friction noises 24 are assigned to the return movement of the cutting tool 6.
  • the cutting noises 25 are below the threshold of the trigger 16 in the selected exemplary embodiment.
  • the sound emission signals 26 are in a Z order of magnitude such that they exceed the trigger 16 threshold. Therefore, in this case, signal is given on line 21, thereby announcing that the cutting tools have become inadmissibly blunt. In this case, care must be taken to ensure that the cutting tools are adjusted or replaced and, if necessary, re-trimmed.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Machine Tool Sensing Apparatuses (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
EP81106141A 1980-08-07 1981-08-05 Dispositif de détection d'usure d'outils Expired EP0045942B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81106141T ATE16851T1 (de) 1980-08-07 1981-08-05 Anordnung zur feststellung von werkzeugverschleiss.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3029957A DE3029957C2 (de) 1980-08-07 1980-08-07 Vorrichtung zum Feststellen des Verschleißes an Schneidwerkzeugen unter Auswertung der am Schneidwerkzeug auftretenden Schwingungen
DE3029957 1980-08-07

Publications (2)

Publication Number Publication Date
EP0045942A1 true EP0045942A1 (fr) 1982-02-17
EP0045942B1 EP0045942B1 (fr) 1985-12-04

Family

ID=6109121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81106141A Expired EP0045942B1 (fr) 1980-08-07 1981-08-05 Dispositif de détection d'usure d'outils

Country Status (4)

Country Link
US (1) US4413507A (fr)
EP (1) EP0045942B1 (fr)
AT (1) ATE16851T1 (fr)
DE (1) DE3029957C2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163850A (en) * 1984-08-29 1986-03-05 Gen Electric Acoustic detection of contact between cutting tool and workpiece
EP0125610B1 (fr) * 1983-05-13 1988-08-17 Siemens Aktiengesellschaft Evaluation de signaux sonores convertis en signaux électriques
EP0285785A1 (fr) * 1987-03-26 1988-10-12 Siemens Aktiengesellschaft Procédé pour déterminer la puissance délivrée par un laser à une pièce à usiner
WO1990002944A1 (fr) * 1988-09-02 1990-03-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procede et dispositif pour controler l'usinage par enlevement de copeaux d'une piece
WO1998017997A1 (fr) * 1996-10-24 1998-04-30 Patel Narendra D Capteur ultrasonique permettant de detecter en ligne la defaillance d'une lame amovible d'un outil de coupe
WO1999015310A1 (fr) * 1997-09-22 1999-04-01 Design & Manufacturing Solutions, Inc. Dispositif et procede permettant de recommander des vitesses preferees du point de vue dynamique pour l'usinage
CN106042004A (zh) * 2016-05-30 2016-10-26 京东方科技集团股份有限公司 一种磨损报警装置和方法

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE425697B (sv) * 1981-03-10 1982-10-25 Sven Erik Olof Sundstrom Forfarande for dimensionsmetning av verktyg och/eller arbetsstycken av metall
GB8300792D0 (en) * 1983-01-12 1983-02-16 Production Eng Res Monitoring tool life
US4574633A (en) * 1983-02-04 1986-03-11 Citizen Watch Company Limited Apparatus for detecting tool damage in automatically controlled machine tool
US4621233A (en) * 1984-01-13 1986-11-04 Rensselaer Polytechnic Institute Non-destructive testing of semiconductors using acoustic wave method
US4535629A (en) * 1984-03-16 1985-08-20 Chamberlain Manufacturing Corporation Method and apparatus for structural monitoring with acoustic emission and using pattern recognition
JPS61159354A (ja) * 1984-09-03 1986-07-19 Toyota Motor Corp 実加工−空加工判別方法および装置
US4636780A (en) * 1984-10-24 1987-01-13 General Electric Company Acoustic monitoring of cutting conditions to detect tool break events
US4636779A (en) * 1984-10-24 1987-01-13 General Electric Company Acoustic detection of tool break events in machine tool operations
US4644335A (en) * 1985-04-05 1987-02-17 International Business Machines Corp. Apparatus and method for monitoring drill bit condition and depth of drilling
US4744242A (en) * 1986-09-16 1988-05-17 The Boeing Company Method for monitoring cutting tool wear during a machining operation
US4831365A (en) * 1988-02-05 1989-05-16 General Electric Company Cutting tool wear detection apparatus and method
US5448911A (en) * 1993-02-18 1995-09-12 Baker Hughes Incorporated Method and apparatus for detecting impending sticking of a drillstring
DE19952994B4 (de) * 1999-11-04 2006-05-24 Hell Gravure Systems Gmbh Verfahren zur Gravur von Druckzylindern
DE19952995A1 (de) * 1999-11-04 2001-05-10 Heidelberger Druckmasch Ag Verfahren zur Gravur von Druckzylindern
US20090129882A1 (en) * 2007-11-15 2009-05-21 D4D Technologies, Llc Methods, Systems, and Devices for Monitoring Tools in a Dental Milling Machine
EP2883999B1 (fr) 2013-12-11 2016-04-20 Garcia Xabier Echeverria Racle pour une machine à papier
DE102021132475A1 (de) 2021-12-09 2023-06-15 Schaeffler Technologies AG & Co. KG Fertigungsanlage und Verfahren zur Verschleißüberwachung an Werkzeugen

Citations (4)

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Publication number Priority date Publication date Assignee Title
US3043132A (en) * 1958-10-16 1962-07-10 Gen Motors Corp Sonic tester
US3516285A (en) * 1967-07-24 1970-06-23 Du Pont Performance analyzer and comparator for a pneumatic jet
US3728621A (en) * 1967-11-27 1973-04-17 Smith E Frost Apparatus for measuring the wear of cutting edges of cutting tools
GB2022262A (en) * 1978-04-26 1979-12-12 Fujitsu Fanuc Ltd Tool wear detection

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US3148537A (en) * 1956-11-26 1964-09-15 North American Aviation Inc Dyna-electronic compensator
US3713127A (en) * 1970-10-16 1973-01-23 Trodyne Corp Acoustic emission crack monitor
US3793627A (en) * 1972-06-28 1974-02-19 Gen Electric Automatic sonic detection of chipped cutting tools
SU456167A1 (ru) * 1973-01-15 1975-01-05 Предприятие П/Я М-5539 Устройство дл измерени механических колебаний
JPS599842B2 (ja) * 1974-07-12 1984-03-05 日本精工株式会社 回転体の損傷検出装置
US4087801A (en) * 1974-12-20 1978-05-02 Tokyo Shibaura Electric Co., Ltd. Apparatus for detecting damages of cutting tools
SU665220A1 (ru) * 1978-01-24 1979-05-30 Научно-Производственное Объединение Автоматгормаш Устройство дл измерени шума
JPS5818183B2 (ja) * 1978-05-30 1983-04-12 株式会社小松製作所 フライスカツタのチツプ破損検出装置
JPS5572810A (en) * 1978-11-29 1980-06-02 Hitachi Ltd Abrasion detecting method for sliding member
JPS5572809A (en) * 1978-11-29 1980-06-02 Hitachi Ltd Method and device for detecting abrasion of sliding member
JPS55106751A (en) * 1979-01-31 1980-08-15 Yoshiaki Kakino Tool damage detector
JPS5676362A (en) * 1979-11-20 1981-06-23 Sumitomo Electric Ind Ltd Rotary cutting tool with tool failure detector
JPS5676363A (en) * 1979-11-20 1981-06-23 Sumitomo Electric Ind Ltd Automatically replaceable cutting tool having tool failure detector

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043132A (en) * 1958-10-16 1962-07-10 Gen Motors Corp Sonic tester
US3516285A (en) * 1967-07-24 1970-06-23 Du Pont Performance analyzer and comparator for a pneumatic jet
US3728621A (en) * 1967-11-27 1973-04-17 Smith E Frost Apparatus for measuring the wear of cutting edges of cutting tools
GB2022262A (en) * 1978-04-26 1979-12-12 Fujitsu Fanuc Ltd Tool wear detection

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* Cited by examiner, † Cited by third party
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PATENT ABSTRACTS OF JAPAN, Band 4, Nr. 86, 20 Juni 1980, Seite 99, P-16; & JP-A-55 050 108 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125610B1 (fr) * 1983-05-13 1988-08-17 Siemens Aktiengesellschaft Evaluation de signaux sonores convertis en signaux électriques
GB2163850A (en) * 1984-08-29 1986-03-05 Gen Electric Acoustic detection of contact between cutting tool and workpiece
EP0285785A1 (fr) * 1987-03-26 1988-10-12 Siemens Aktiengesellschaft Procédé pour déterminer la puissance délivrée par un laser à une pièce à usiner
WO1990002944A1 (fr) * 1988-09-02 1990-03-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procede et dispositif pour controler l'usinage par enlevement de copeaux d'une piece
WO1998017997A1 (fr) * 1996-10-24 1998-04-30 Patel Narendra D Capteur ultrasonique permettant de detecter en ligne la defaillance d'une lame amovible d'un outil de coupe
WO1999015310A1 (fr) * 1997-09-22 1999-04-01 Design & Manufacturing Solutions, Inc. Dispositif et procede permettant de recommander des vitesses preferees du point de vue dynamique pour l'usinage
US6085121A (en) * 1997-09-22 2000-07-04 Design & Manufacturing Solutions, Inc. Device and method for recommending dynamically preferred speeds for machining
CN106042004A (zh) * 2016-05-30 2016-10-26 京东方科技集团股份有限公司 一种磨损报警装置和方法
CN106042004B (zh) * 2016-05-30 2018-09-11 京东方科技集团股份有限公司 一种磨损报警装置和方法

Also Published As

Publication number Publication date
US4413507A (en) 1983-11-08
DE3029957A1 (de) 1982-02-25
DE3029957C2 (de) 1983-05-11
EP0045942B1 (fr) 1985-12-04
ATE16851T1 (de) 1985-12-15

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